Pianoforte.



PIANOFORTE. APPLIGATIQN FILED 00124, 1907.

A 'Patented Oct. 20, 1908; 2 sums-SHEET 1.

' '/NVENTOH- i 4 WINFRED BT. HILL.-

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ATTORNEYS.

W. R. T. HILL.

PIANOFORTE. 4 PPPP GATION MLED om? 4 1907.

' f 901,615. Patented oct. 2o, 190s.

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A TTOHNE YS OFFCE WINFREDROWLAND THOMAS HILL, `OIT ASHEVILLE, NORTH CAROLINA, ASSIGNOR O-F ONE- f THIRDy To i. n. norman,

OF ASHEVILLE, NORTH Specication o'Letters Patent. vApplication filed-October 4, 1907. Serial No. 395,902.

CAROLINA.

PIANOFORTE.

Patented Oct. 20, 1908.

To all whom 'it may concern: i Y i Be itknown that I, 'VVINFRED R. T. HILL, a subject of the Kino of Great Britain, residing atAsheville, in t e county of Buneombe and State of North Carolina, United States of America, have invented a new and useful In rovement in Pianofortes, of which the follldwing is a specification'.

fortes and consists in certain novel constructions and combinations of parts hereinafter described and claimed. Referring to the drawings forming a art hereof-,#Fgure 1 is a cross section of a piano frame showing the improved construction, the section being taken through that art of the frame having three strings for eac note.

- Fig. 2 is a detail in section through the top of main.' frame, and the struction.

sound boards from the pressure `site on both sides,

the frame in the part havinlg each note. Fig. 3 is a simi ar view through the bass having only one string for each note.

Fig. 4 is a detail in l erspective of oneef the brackets to which t e strings are connected.

Referring to the drawings, the main frame 1I is of ordinary construction, and on oppoL site sides of thisy frame are arranged the sound boards 2 and 2, also of usual con- The sound boards are supported at their edges by strips 4 and 4Il glued to the main frame, and bridges 3 and 3 are glued l upon the/top of the sound boards and may be formed with-a continuous curve to conform to the length of the vibrating strings. 'lhe strips 4 and 4 are set slightly to the outer side ofthe bridges 3am] 3, so that the sound boards rest on the strips 4 and 4, and about one half of the bridges lie directly over the saidf'strips. This prevents sagging ot' the of the stri ugs on the bridges, As shown the sides are alike, and the bridges placed exactly oppoposite sides is balanced and sidewise bendingv ofv Vthe main trame 1s prevented.

The strings S and S are fastened at' the 10, which extends across the bottom of the strings rest on the bridges andv 3Ll at top and bottom. The strings are fastened at the top to pins 21, on angular brackets 20, there being one bracket for 4each string. "lhe brackets rest on the ledgesof angle plates or strips 12 and 12a,

My invention is an improvement in piano,

two strings for so that the pressure on opseated' in rabbets in the top edge of the main ame, and said brackets are' engaged and held by nuts 19, which screw on the opposite lends of threaded tuning pins 13, 14 and 115, 'which pins extend through the opposite plates 12 and 12a and the. top of the main ame.

In that section of the instrument having three strings, the plates 12 and 12a have three steps; in that section having two strings the plates have two steps, and in the bass they have one step,'as shown in Figs. 1, 2 and 3, respectively. In the form shown in Fig. 1, spaclhg blocks ll'and 11u are glued to t. e frame to give the s ace requisite for placing the three plates. t is obvious that when the nuts if) are turned, the brackets 20 will be moved toward or from each other to tighten or loosen the strings. f

Fig. 1 shows part oi an action for sounding both sets from one key-board, and and 6 are rails running across the' frontend back, the saidv rails carrying the squares 7 and 7, and the iront rail may be operated by an ordinary foot pedal. When the rail is lowered, the end of the square rests upon. the end oi' the key 8, and since the square 7 is connected by the wire 22 With the square '7L the movement of the key 8 will operate both I squares at the same time. The abstract 9 o :crates the front action, not shown. An ,l abstract- 9 is operated by the free end of the square 7, the abstract 9 operatir')F the rear action. .lt will be evident that when the rail is lowered so that the end of the s( uare 7 rests on. the end of the key, both the 'iront and rear action. @vill be operated by the key, while, when the rail is raised to bring the square out olcontact with the key, only the front action will be operated.

lt will be observed, that the tension on the opposite sides of the iframe is balanced., so that bending strain on the frame is eliminated, also that the sound boards are made without ribs, the strings resting on a bridge at each end.

The double set of strings permits Wide range oi volume of sound as Well as the use oi" two keyboards, one at the front and onev using the front onl thereby better balance or" sound en avoiding any deeieney in the treble. Y

I claim: l. In e pieno ferte, the combinaten efe mein frame, a sound board on the side of the same, strigis between the edges of lchev sound.

1n `tension over beard une the frame, stn the sound Aboard,l and bri ges between the strings end the sound board, seid bridges and stxips being-located epposite each other.

2. In e pieno forte, the combination/0f e thereof, screws extending through the ed e ef the frame and having nuts upon both en 15 A ,i thereof, end connections between the nuts'. and the corresponding vem'iaalfenopposite sides. l

* y W-INEREI) fRGWL-AND-THOMAS HIL'L.l l

Witnesses: Y

, JAMESMOORE Gaines, HUGH LA BAR-BE', V 0'. C. MILLS. 

